<?php

if (!defined('_PS_VERSION_')) {
    exit;
}

class Simple_withdrawalbuttonWithdrawModuleFrontController extends ModuleFrontController
{
    public $ssl = true;
    public $auth = false;
    public $guestAllowed = true;

    /** @var string */
    private $currentView = 'form';

    /** @var array */
    private $formData = [];

    /** @var array */
    private $errorsList = [];

    /** @var array */
    private $successData = [];

    public function initContent()
    {
        parent::initContent();

        $this->context->smarty->assign([
            'errors_list' => $this->errorsList,
            'form_data' => $this->formData,
            'csrf_token' => $this->module->getFrontToken(),
            'action_url' => $this->context->link->getModuleLink($this->module->name, 'withdraw', [], true),
            'success_data' => $this->successData,
            'privacy_url' => (string) Configuration::get(Simple_withdrawalbutton::CONF_PRIVACY_URL),
            'revocation_url' => (string) Configuration::get(Simple_withdrawalbutton::CONF_REVOCATION_URL),
            'withdrawal_deadline' => $this->computeDeadline(),
        ]);

        if ($this->currentView === 'confirm') {
            $this->setTemplate('module:' . $this->module->name . '/views/templates/front/confirm.tpl');
            return;
        }

        if ($this->currentView === 'success') {
            $this->setTemplate('module:' . $this->module->name . '/views/templates/front/success.tpl');
            return;
        }

        $this->setTemplate('module:' . $this->module->name . '/views/templates/front/form.tpl');
    }

    public function postProcess()
    {
        if (Tools::isSubmit('submit_withdrawal_prepare')) {
            $this->handlePrepare();
            return;
        }

        if (Tools::isSubmit('submit_withdrawal_confirm')) {
            $this->handleConfirm();
            return;
        }

        if (Tools::isSubmit('submit_withdrawal_back')) {
            $this->formData = $this->collectInput();
            $this->currentView = 'form';
            return;
        }

        $this->formData = $this->getEmptyFormData();
    }

    private function handlePrepare()
    {
        $data = $this->collectInput();
        $this->formData = $data;

        if (!$this->module->isValidFrontToken(Tools::getValue('csrf_token'))) {
            $this->errorsList[] = $this->module->l('The form could not be validated. Please reload the page and try again.', 'withdraw');
        }

        if ($this->isHoneypotFilled()) {
            $this->errorsList[] = $this->module->l('The form could not be validated. Please reload the page and try again.', 'withdraw');
        }

        $this->errorsList = array_merge($this->errorsList, $this->validateData($data));

        if (!empty($this->errorsList)) {
            $this->currentView = 'form';
            return;
        }

        $this->currentView = 'confirm';
    }

    private function handleConfirm()
    {
        $data = $this->collectInput();
        $this->formData = $data;

        if (!$this->module->isValidFrontToken(Tools::getValue('csrf_token'))) {
            $this->errorsList[] = $this->module->l('The form could not be validated. Please reload the page and try again.', 'withdraw');
        }

        if ($this->isHoneypotFilled()) {
            // Do not save obvious bot submissions. Show a generic success page to avoid feedback loops.
            $this->currentView = 'success';
            $this->successData = [
                'mail_ok' => true,
                'fake' => true,
            ];
            return;
        }

        $this->errorsList = array_merge($this->errorsList, $this->validateData($data));

        $ipHash = $this->module->hashForPrivacy($this->module->getClientIp());
        if (empty($this->errorsList) && $this->module->isRateLimited($data['customer_email'], $ipHash)) {
            $this->errorsList[] = $this->module->l('Too many withdrawal declarations were submitted in a short period. Please try again later or contact us by email.', 'withdraw');
        }

        if (!empty($this->errorsList)) {
            $this->currentView = 'form';
            return;
        }

        $saved = $this->module->saveWithdrawal($data);
        if (!$saved) {
            $this->errorsList[] = $this->module->l('Your withdrawal declaration could not be saved. Please try again or contact us by email.', 'withdraw');
            $this->currentView = 'form';
            return;
        }

        $customerMailOk = $this->module->sendCustomerConfirmation($data, $saved['created_at']);
        $shopMailOk = $this->module->sendShopNotification($data, $saved['created_at'], (int) $saved['id_withdrawal_request']);

        if ($customerMailOk) {
            $this->module->markConfirmationSent((int) $saved['id_withdrawal_request']);
        }

        $this->currentView = 'success';
        $this->successData = [
            'id_withdrawal_request' => (int) $saved['id_withdrawal_request'],
            'created_at' => $this->module->formatDateTimeForMail($saved['created_at']),
            'mail_ok' => (bool) $customerMailOk,
            'shop_mail_ok' => (bool) $shopMailOk,
            'customer_email' => $data['customer_email'],
            'order_reference' => $data['order_reference'],
            'withdrawal_scope' => $data['withdrawal_scope'],
            'withdrawal_items_text' => $data['withdrawal_items_text'],
            'message' => $data['message'],
        ];
    }

    private function collectInput()
    {
        $scope = (string) Tools::getValue('withdrawal_scope');
        if (!in_array($scope, ['full', 'partial'], true)) {
            $scope = 'full';
        }

        return [
            'customer_name' => $this->module->cleanText(Tools::getValue('customer_name'), 255),
            'customer_email' => strtolower($this->module->cleanText(Tools::getValue('customer_email'), 255)),
            'order_reference' => $this->module->cleanText(Tools::getValue('order_reference'), 64),
            'withdrawal_scope' => $scope,
            'withdrawal_items_text' => $this->module->cleanText(Tools::getValue('withdrawal_items_text'), 5000),
            'message' => $this->module->cleanText(Tools::getValue('message'), 5000),
        ];
    }

    private function getEmptyFormData()
    {
        $customerName = '';
        $customerEmail = '';

        if (Validate::isLoadedObject($this->context->customer)) {
            $customerName = trim((string) $this->context->customer->firstname . ' ' . (string) $this->context->customer->lastname);
            $customerEmail = (string) $this->context->customer->email;
        }

        $orderRef = $this->module->cleanText(Tools::getValue('ref'), 64);

        return [
            'customer_name' => $customerName,
            'customer_email' => $customerEmail,
            'order_reference' => $orderRef,
            'withdrawal_scope' => 'full',
            'withdrawal_items_text' => '',
            'message' => '',
        ];
    }

    private function computeDeadline()
    {
        $ref = isset($this->formData['order_reference']) ? $this->formData['order_reference'] : '';
        if ($ref === '') {
            $ref = $this->module->cleanText(Tools::getValue('ref'), 64);
        }
        if ($ref === '') {
            return '';
        }

        $orderInfo = $this->module->lookupOrderInfoByReference($ref);
        if (!$orderInfo) {
            return '';
        }

        $isoCode = Language::getIsoById((int) $this->context->language->id) ?: 'de';
        return (string) $this->module->computeWithdrawalDeadline($orderInfo['date_add'], $isoCode);
    }

    private function validateData(array $data)
    {
        $errors = [];

        if ($data['customer_name'] === '' || Tools::strlen($data['customer_name']) < 2) {
            $errors[] = $this->module->l('Please enter your name.', 'withdraw');
        }

        if (!Validate::isEmail($data['customer_email'])) {
            $errors[] = $this->module->l('Please enter a valid email address for the confirmation.', 'withdraw');
        }

        if ($data['order_reference'] === '') {
            $errors[] = $this->module->l('Please enter the order number or order reference.', 'withdraw');
        }

        if (!in_array($data['withdrawal_scope'], ['full', 'partial'], true)) {
            $errors[] = $this->module->l('Please select whether you want to withdraw the full order or part of it.', 'withdraw');
        }

        if ($data['withdrawal_scope'] === 'partial' && $data['withdrawal_items_text'] === '') {
            $errors[] = $this->module->l('For a partial withdrawal, please enter the affected items and quantities.', 'withdraw');
        }

        return $errors;
    }

    private function isHoneypotFilled()
    {
        return trim((string) Tools::getValue('cyp_hp_v1')) !== '';
    }
}